We examined the effect of New Zealand blackcurrant (NZBC) extract on high-intensity intermittent running and post-running lactate responses. Thirteen active males (age: 25±4 yrs, height: 1.82±0.07 m, body mass: 81±14 kg, V̇O2max: 56±4 mL∙kg-1∙min-1, vV̇O2max: 17.6±0.8 km∙h-1) performed a treadmill running protocol to exhaustion, which consisted of stages with 6x19 s of sprints with 15 s of low-intensity running between sprints. Inter-stage rest time was 1 minute and stages were repeated with increasing sprint speeds. Subjects consumed capsuled NZBC extract (300 mg∙day-1 CurraNZ™; containing 105 mg anthocyanin) or placebo for 7 days (double blind, randomised, cross-over design, wash-out at least 14 days). Blood lactate was collected for 30 min post-exhaustion. NZBC increased total running distance by 10.6% (NZBC: 4282±833 m, placebo: 3871±622 m, P=0.02), with the distance during sprints increased by 10.8% (P=0.02). Heart rate, oxygen uptake, lactate and rating of perceived exertion were not different between conditions for the first 4 stages completed by all subjects. At exhaustion, blood lactate tended to be higher for NZBC (NZBC: 6.01±1.07 mmol∙L-1, placebo: 5.22±1.52 mmol∙L-1, P=0.07). There was a trend for larger changes in lactate following 15 min (NZBC: -2.89±0.51 mmol∙L-1, placebo: -2.46±0.39 mmol∙L-1, P=0.07) of passive recovery. New Zealand blackcurrant extract (CurraNZ™) may enhance performance in sports characterised by high-intensity intermittent exercise as greater distances were covered with repeated sprints, there was higher lactate at exhaustion, and larger changes in lactate during early recovery after repeated sprints to exhaustion.